package org.apache.maven.repository;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.io.File;
import java.util.EventObject;

/**
 * TransferEvent is used to notify TransferListeners about progress in transfer of resources form/to
 * the repository
 *
 * @author <a href="michal.maczka@dimatics.com">Michal Maczka</a>
 */
public class ArtifactTransferEvent extends EventObject {
  /**
   * A transfer was attempted, but has not yet commenced.
   */
  public static final int TRANSFER_INITIATED = 0;

  /**
   * A transfer was started.
   */
  public static final int TRANSFER_STARTED = 1;

  /**
   * A transfer is completed.
   */
  public static final int TRANSFER_COMPLETED = 2;

  /**
   * A transfer is in progress.
   */
  public static final int TRANSFER_PROGRESS = 3;

  /**
   * An error occurred during transfer
   */
  public static final int TRANSFER_ERROR = 4;

  /**
   * Indicates GET transfer (from the repository)
   */
  public static final int REQUEST_GET = 5;

  /**
   * Indicates PUT transfer (to the repository)
   */
  public static final int REQUEST_PUT = 6;

  private int eventType;

  private int requestType;

  private Exception exception;

  private File localFile;

  private ArtifactTransferResource artifact;

  private long transferredBytes;

  private byte[] dataBuffer;

  private int dataOffset;

  private int dataLength;

  public ArtifactTransferEvent(String wagon, final int eventType, final int requestType, ArtifactTransferResource artifact) {
    super(wagon);

    setEventType(eventType);

    setRequestType(requestType);

    this.artifact = artifact;
  }

  public ArtifactTransferEvent(String wagon, final Exception exception, final int requestType, ArtifactTransferResource artifact) {
    this(wagon, TRANSFER_ERROR, requestType, artifact);

    this.exception = exception;
  }

  public ArtifactTransferResource getResource() {
    return artifact;
  }

  /**
   * @return Returns the exception.
   */
  public Exception getException() {
    return exception;
  }

  /**
   * Returns the request type.
   *
   * @return Returns the request type. The Request type is one of
   *         <code>TransferEvent.REQUEST_GET<code> or <code>TransferEvent.REQUEST_PUT<code>
   */
  public int getRequestType() {
    return requestType;
  }

  /**
   * Sets the request type
   *
   * @param requestType The requestType to set. The Request type value should be either
   *        <code>TransferEvent.REQUEST_GET<code> or <code>TransferEvent.REQUEST_PUT<code>.
   * @throws IllegalArgumentException when
   */
  public void setRequestType(final int requestType) {
    switch (requestType) {

      case REQUEST_PUT:
        break;
      case REQUEST_GET:
        break;

      default:
        throw new IllegalArgumentException("Illegal request type: " + requestType);
    }

    this.requestType = requestType;
  }

  /**
   * @return Returns the eventType.
   */
  public int getEventType() {
    return eventType;
  }

  /**
   * @param eventType The eventType to set.
   */
  public void setEventType(final int eventType) {
    switch (eventType) {

      case TRANSFER_INITIATED:
        break;
      case TRANSFER_STARTED:
        break;
      case TRANSFER_COMPLETED:
        break;
      case TRANSFER_PROGRESS:
        break;
      case TRANSFER_ERROR:
        break;
      default:
        throw new IllegalArgumentException("Illegal event type: " + eventType);
    }

    this.eventType = eventType;
  }

  /**
   * @return Returns the local file.
   */
  public File getLocalFile() {
    return localFile;
  }

  /**
   * @param localFile The local file to set.
   */
  public void setLocalFile(File localFile) {
    this.localFile = localFile;
  }

  public long getTransferredBytes() {
    return transferredBytes;
  }

  public void setTransferredBytes(long transferredBytes) {
    this.transferredBytes = transferredBytes;
  }

  public byte[] getDataBuffer() {
    return dataBuffer;
  }

  public void setDataBuffer(byte[] dataBuffer) {
    this.dataBuffer = dataBuffer;
  }

  public int getDataOffset() {
    return dataOffset;
  }

  public void setDataOffset(int dataOffset) {
    this.dataOffset = dataOffset;
  }

  public int getDataLength() {
    return dataLength;
  }

  public void setDataLength(int dataLength) {
    this.dataLength = dataLength;
  }

  public String toString() {
    StringBuffer sb = new StringBuffer();

    sb.append("TransferEvent[");

    switch (this.getRequestType()) {
      case REQUEST_GET:
        sb.append("GET");
        break;
      case REQUEST_PUT:
        sb.append("PUT");
        break;
      default:
        sb.append(this.getRequestType());
        break;
    }

    sb.append("|");
    switch (this.getEventType()) {
      case TRANSFER_COMPLETED:
        sb.append("COMPLETED");
        break;
      case TRANSFER_ERROR:
        sb.append("ERROR");
        break;
      case TRANSFER_INITIATED:
        sb.append("INITIATED");
        break;
      case TRANSFER_PROGRESS:
        sb.append("PROGRESS");
        break;
      case TRANSFER_STARTED:
        sb.append("STARTED");
        break;
      default:
        sb.append(this.getEventType());
        break;
    }

    sb.append("|");
    sb.append(this.getLocalFile()).append("|");
    sb.append("]");

    return sb.toString();
  }

  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + eventType;
    result = prime * result + ((exception == null) ? 0 : exception.hashCode());
    result = prime * result + ((localFile == null) ? 0 : localFile.hashCode());
    result = prime * result + requestType;
    return result;
  }

  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if ((obj == null) || (getClass() != obj.getClass())) {
      return false;
    }
    final ArtifactTransferEvent other = (ArtifactTransferEvent) obj;
    if (eventType != other.eventType) {
      return false;
    }
    if (exception == null) {
      if (other.exception != null) {
        return false;
      }
    } else if (!exception.getClass().equals(other.exception.getClass())) {
      return false;
    }
    if (requestType != other.requestType) {
      return false;
    } else if (!source.equals(other.source)) {
      return false;
    }
    return true;
  }

}
